The generator matrix

 1  0  1  1  1  4  1  1  0  1  1  2  1  1  0  1  1  4  1  1  4  1  1  2  1  6  1  1  6  1  1  4  1  1  6  1  2  1  1  0  1  2  1  2  1  1  0  1  1  1  1  1  1  4  1  1  1  1  1  1  1  1  1  1  1  1  1  2  4  1  1  1  1  4  6  1  2  2  1  1  1  1  1  1
 0  1  1  0  3  1  1  0  1  2  5  1  0  7  1  0  5  1  0  5  1  5  6  1  4  1  7  2  1  7  6  1  7  2  1  1  1  6  2  1  6  1  4  1  3  1  2  7  3  7  3  3  3  2  3  7  3  7  5  5  7  5  5  7  1  5  3  6  1  4  4  1  4  1  1  4  1  6  7  5  5  1  7  3
 0  0  2  0  0  0  0  2  2  2  2  2  4  4  4  4  4  4  6  6  6  6  6  6  2  2  0  0  4  6  2  2  0  0  4  6  0  6  4  6  4  0  6  6  4  2  6  0  6  4  2  4  2  2  2  6  6  2  0  0  2  4  4  6  2  6  4  4  4  0  4  0  6  6  2  6  4  0  6  2  2  0  2  4
 0  0  0  2  4  2  6  2  2  4  6  4  4  0  4  6  2  6  6  4  6  2  0  0  0  2  2  6  4  0  2  0  4  0  2  2  6  6  4  4  2  0  4  6  0  6  2  6  4  2  0  6  4  6  2  2  6  6  0  4  0  4  0  4  4  0  2  0  4  2  4  2  2  4  6  0  6  4  6  0  2  4  4  0

generates a code of length 84 over Z8 who´s minimum homogenous weight is 80.

Homogenous weight enumerator: w(x)=1x^0+259x^80+156x^82+258x^84+136x^86+158x^88+28x^90+22x^92+4x^112+2x^120

The gray image is a code over GF(2) with n=336, k=10 and d=160.
This code was found by Heurico 1.16 in 24.4 seconds.